package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavors(DishDTO dishDTO) {
        log.info("新增菜品{}",dishDTO);
        //在dish表中插入新数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);

        //获取dish表中的id   给到dish_flavor表中的dish_id
        Long id = dish.getId();


        //在dish_flavor表中插入数据(0条或者多条)
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor f : flavors) {
                f.setDishId(id);
                dishFlavorMapper.insertDishFlavor(f);

            }
        }


    }

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {


       PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
       Page<DishVO> page =  dishMapper.pageQuery(dishPageQueryDTO);


        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品删除
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {

        //判断是否在起售状态
        for (Long id : ids) {
            Dish dish =dishMapper.select(id);
            if(dish.getStatus()==1){
                throw  new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断是否在套餐中
        List<Long> setmealId = setmealDishMapper.selectByDishId(ids);

        if(setmealId !=null && setmealId.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);

        }

        //删除菜品表dish中的数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除删除flavor_dish表中的数据
//            dishFlavorMapper.deleteByDishId(id);
//
//        }

        //根据ids集合批量删除菜品表dish中的数据
        dishMapper.dleteByIds(ids);

        //根据dish_id集合批量删除删除flavor_dish表中的数据
        dishFlavorMapper.deleteByDishIds(ids);


    }

    /**
     * 根据id查询数据
     * @param id
     * @return
     */
    public DishVO getdById(Long id) {
        //根据id在dish查数据
        Dish dish =dishMapper.select(id);

        //根据id在dish_flavor查数据
        List<DishFlavor> dishFlavors  = dishFlavorMapper.select(id);

        //将Dish和DishFlavor的数据都导入到DishVO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }


    /**
     * 菜品修改
      * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {

        //修改菜品表基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0) {
            for (DishFlavor f : flavors) {
                f.setDishId(dishDTO.getId());
                dishFlavorMapper.insertDishFlavor(f);
            }
        }


    }



    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 菜品起售或停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id).build();

        dishMapper.update(dish);

    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.select(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
